双声源法调制回热器边界声场的理论分析  

Theoretical analysis for modulating acoustic boundary conditions of a regenerator by double acoustic drivers

作　　者：李雷[1,2] 谢秀娟[1] 周立华[1,2] 李青[1] 

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院研究生院,北京100039

出　　处：《低温工程》2009年第6期30-35,共6页Cryogenics

基　　金：中国科学院重大科研装备研制项目(YZ200738);中国科学院知识创新工程青年人才领域前沿项目(TYF0807)资助

摘　　要：为了方便获得热声系统较佳的回热器边界条件,提出了双声源法调制回热器边界声场的方案。基于Rott方程,推导出回热器以及有阻尼谐振管中的声场表达式,建立了回热器边界声场调制的理论模型,得到了回热器边界声场和双声源的声压之间的关系。理论分析表明双声源法可以实现回热器边界声场的任意调节,并实际讨论了各种回热器声场边界条件的调制方法。To achieve satisfied boundary conditions of acoustic field of a regenerator in a thermoacoustie system, a solution of modulating acoustic boundary conditions of a regenerator by two acoustic-drivers was proposes. The acoustic field both in a regenerator and in a resonator was formulated based on Rott Equation, a theoretical model to modulate acoustic boundary conditions of a regenerator was established. Then the relationship between acoustic boundary conditions of a regenerator and the two acoustic drivers was obtained. The theoretical analysis verifies that any acoustic boundary conditions of a regenerator could be modulated and obtained easily. In addition, the procedures to modulate some typical acoustic boundary conditions of a regenerator were offered.

关 键 词：双声源法 回热器 边界声场 

分 类 号：TB651[一般工业技术—制冷工程] TB618